Zhou, Guanghui, Xianhua Gui, Ruhua Chen, Xingli Fu, Xiuhai Ji, and Hui Ding. “Elevated Serum Activin A in Chronic Obstructive Pulmonary Disease With Skeletal Muscle Wasting”. Clinics 74 (June 28, 2019): e981. Accessed July 4, 2024. https://periodicos.usp.br/clinics/article/view/159503.